{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2024-56684",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-12-27T15:00:39.846Z",
        "datePublished": "2024-12-28T09:46:11.932Z",
        "dateUpdated": "2026-08-05T11:46:03.800Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T11:46:03.800Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mtk-cmdq: fix wrong use of sizeof in cmdq_get_clocks()\n\nIt should be size of the struct clk_bulk_data, not data pointer pass to\ndevm_kcalloc()."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.4,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The defect is in the MediaTek CMDQ mailbox platform driver's probe path (`cmdq_probe()` → `cmdq_get_clocks()`), reachable only on the local system when the driver binds to its DT node; there is no remote or network-facing path into this code.\nAC:L - The undersized `devm_kcalloc()` is exactly half the required size on every supported platform (gce_num 1 or 2, all arm64), so the out-of-bounds write occurs deterministically on every probe with no timing, layout, or state condition to win.\nPR:N - The heap corruption happens unconditionally during driver probe at boot on affected MediaTek SoCs, requiring no privileges or attacker interaction whatsoever; this matches the scoring of the equivalent probe-time allocation-size CVEs (CVE-2025-39869, CVE-2026-43274).\nUI:N - No victim action is needed — the driver probes automatically at boot on matching hardware, and the out-of-bounds reads recur on every runtime-resume and interrupt without any user involvement.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The half-sized array is subsequently read out of bounds by `clk_bulk_prepare()`/`clk_bulk_enable()`/`clk_bulk_unprepare()`, pulling a `struct clk *` from adjacent heap and dereferencing it; combined with the overlapping heap write this constitutes memory corruption leverageable for kernel memory disclosure.\nI:H - This is an out-of-bounds heap write of up to 16 bytes of pointer values (`clk_bulk_data.id` and `.clk`) past the end of the devres allocation, corrupting adjacent kernel objects — an OOB write is scored High.\nA:H - Corrupting the adjacent heap object and later dereferencing an out-of-bounds `struct clk *` in `clk_prepare()`/`clk_enable()` readily produces an oops or panic, and the overflow is flagged as slab-out-of-bounds under KASAN/SLUB redzoning."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/mailbox/mtk-cmdq-mailbox.c"
                    ],
                    "versions": [
                        {
                            "version": "aa1609f571caba0db102c611829d48adf226bb70",
                            "lessThan": "31986fad0cfdda8d8893230da04f5eb0774854d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa1609f571caba0db102c611829d48adf226bb70",
                            "lessThan": "a9c7cb960fc6e056ebecebd136a127612b15630d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aa1609f571caba0db102c611829d48adf226bb70",
                            "lessThan": "271ee263cc8771982809185007181ca10346fe73",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/mailbox/mtk-cmdq-mailbox.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.11.11",
                            "lessThanOrEqual": "6.11.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.2",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.13",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.11.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.12.2"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.13"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/31986fad0cfdda8d8893230da04f5eb0774854d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a9c7cb960fc6e056ebecebd136a127612b15630d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/271ee263cc8771982809185007181ca10346fe73"
                }
            ],
            "title": "mailbox: mtk-cmdq: fix wrong use of sizeof in cmdq_get_clocks()",
            "x_generator": {
                "engine": "bippy-1.2.0"
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}